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壓電式加速度傳感器,又稱振動傳感器,是基于壓電晶體的壓電效應(yīng)工作的。某些晶體在一定方向上受力變形時,其內(nèi)部會產(chǎn)生極化現(xiàn)象,同時在它的兩個表面上產(chǎn)生符號相反的電荷;當外力去除后,又重新恢復(fù)到不帶電狀態(tài),這種現(xiàn)象稱為“壓電效應(yīng)",具有“壓電效應(yīng)"的晶體稱為壓電晶體。常用的壓電晶體有石英、壓電陶瓷等,在現(xiàn)代生產(chǎn)生活中被應(yīng)用于許許多多的方面,如手提電腦的硬盤抗摔保護,目前用的數(shù)碼相機和攝像機里,也有加速度傳感器,用來檢測拍攝時候的手部的振動,并根據(jù)這些振動,自動調(diào)節(jié)相機的聚焦。壓電加速度傳感器還應(yīng)用于汽車安全氣囊、防抱死系統(tǒng)、牽引控制系統(tǒng)等安全性能方面。
美國Dytran的3225F是一款超小型IEPE加速度傳感器/振動傳感器,靈敏度10mv/g,重量僅為0.6g。
The Dytran model 3225F is an ultra miniature teardrop low profile IEPE accelerometer with a sensitivity of 10 mV/g, designed to adhesively mount in spaces typically inaccessible to other types of accelerometers. The sensor has an overall height of 0.16-inches (4.1-millimeters) and weighs just 0.6 grams.
Featuring a quartz shear sensing element in a lightweight titanium housing, the model 3225F utilizes an integral 3-foot (0.9-meter) cable terminating to a 10-32 jack.
特性
1. 10 mV/g sensitivity
2. 500g range
3. 1.6 to 10,000 Hz (±10%)
4. 3-foot (0.9-meter) integral cable
5. Adhesive mount
6. 0.6 grams
7. Titanium
8. Ultra miniature teardrop design
9. IEPE
應(yīng)用
1. Environmental Stress Screening (ESS)
環(huán)境應(yīng)力篩選
2. Mechanical shock
機械沖擊試驗
3. PC board vibration measurements
印刷電路板振動檢測
4. Product response testing
產(chǎn)品響應(yīng)試驗
5. General purpose vibration measurements where space is at a premium
受限空間內(nèi)的通用振動測量
WEIGHT 0.6 GRAMS
SIZE (DIA x LENGTH HEX x HEIGHT) 0.25 x 0.36 x .150 INCHES
MOUNTING PROVISION FLAT MOUNTING SURFACE FOR ADHESIVE MOUNT
CONNECTOR, COAXIAL 10-32 JACK AT END OF FIXED 3 FT. CABLE
CASE MATERIAL TITANIUM
SENSING ELEMENT PLANAR SHEAR QUARTZ
PERFORMANCE
SENSITIVITY, ± 10% [1] [2] 10.0 mV/G
RANGE F.S. 500 G's
FREQUENCY RESPONSE, ± 10 % [3] 1.6 to 10,000 Hz
MOUNTED RESONANT FREQUENCY, NOM. 40 kHz
EQUIVALENT ELECTRICAL NOISE FLOOR .007 G’s RMS
AMPLITUDE NON-LINEARITY (ZERO BASED BEST FIT ST.LINE METHOD) 2.0 % F.S., MAX.
TRANSVERSE SENSITIVITY, MAX. 5 PERCENT
STRAIN SENSITIVITY .0005 G's PER MICROSTRAIN @ 250/??
ENVIRONMENTAL
MAXIMUM VIBRATION 400 G's, RMS
MAXIMUM SHOCK 5000 G's, PEAK
TEMPERATURE RANGE -60 TO 250 oF
THERMAL COEFFICIENT OF SENSITIVITY .03 %.°F
ENVIRONMENTAL SEAL EPOXY
ELECTRICAL
SUPPLY CURRENT/COMPLIANCE VOLTAGE RANGE [3] 2 to 20/+18 to +30 mA/Volts
OUTPUT IMPEDANCE, TYP. 100 Ohms
BIAS VOLTAGE +7 to +10 VDC
訂貨型號
3225F 超小型
3225F1 超小型
3225F2 超小型
3225F3 超小型
3225F4 超小型
3225F5 超小型
3225F6 超小型
3225F7 超小型
3225F1T 超小型TEDS
3225F2T 超小型TEDS
3225F3T 超小型TEDS
3225F4T 超小型TEDS
3225F5T 超小型TEDS
3225F6T 超小型TEDS
配件
1. Model 6298 Petro mounting wax, (1) model 6591A installation/removal wrench
2. Model 4110C current source power unit, model 6273 petro mounting wax
3. 電纜:6011A
相關(guān)型號
3225E 高溫型
3225E1 高溫型
3225E2 高溫型
3225E3 高溫型
3225M5 高溫型
3225M7 高溫型
3225M23 高溫型
3225M23T 高溫型TEDS
3225M24T 高溫型TEDS
3225M34 高溫型TEDS
3225M36 高溫型
3225M37 高溫型
3225M39 高溫型
3225M40 高溫型
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